Top definition
Poor, ineffective scam artist or con-man. From the TV sitcom, Only Fools and Horses.
Daves a proper del boy.
by oracle March 12, 2004
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2
Small fat penis, that barely changes on becoming aroused.
"Smithy had a sweaty del boy after all that but it still seemed to do the trick"
by cwish March 25, 2008
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